How do i contact the dma? DMA House. 70 Margaret Street. London W1W 8SS. Tel: 020 7291 3300. Fax: 020 7291 3301. DMA Membership Enquiries. To find out more about what we can do for you, contact our Membership team. Tel: 020 7291 3337. E: [email protected]. What is dma and how does it work? Utilizing intelligent algorithms, DMA dynamically routes calls throughout the secured network based on priority, class of service, resource availability and network outage with highly efficient load balancing and virtualization of bridging resources.Why choose dma europa ltd? DMA Europa. DMA Europa Ltd provides customers with high quality media management and production, combining technical writing and images; personal service and unrivalled experience to ensure the success of PR campaigns.Why choose dma solicitors? We are committed to providing our clients with the utmost excellence in legal expertise and client care irrespective of the intricacy of our clients’ case. DMA Solicitors offices are conveniently located in the heart of West London, easily accessible by public transport or car.